October 2014
Intermediate to advanced
382 pages
8h 27m
English
Content preview from WebRTC Integrator's GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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WebRTC connectivity to the PSTN
For WebRTC connectivity to the PSTN phone, we can adopt one of two approaches: while the first approach is suited to an evolving next generation IMS landscape, the second approach depicts an IN setup. The IN approach is discussed not because all service providers have completely migrated to the IMS landscape, but because the IN service flow and call execution still holds good for many phones. The existing INs have hooks for interconnectivity between cellular phones and old analog phones. This was established using legacy PSTN gateways that took care of the digital-to-analog conversion. The ISUP switch provides the conversion to ISUP, which is responsible for setting up telephone calls in the IN network.
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